Cylindrical container



April 3, 19454. w A R|NGLER 2,372,740

v GYLINDRICAL CONTAINER Filed Oct. 2, 1942 INVENTOR.

v ATTORNEYS.

UNITED [STATI-:s PATENT OFFICE CYLINDRIGAL CONTAINER WilllainA. Bingle'r, Wayne, Pa., signor to The Gardner-Richardson Company, hlo,acorporation of Ohio Application October Middletown.

z, 1942. serial No. 460,510 z claims. (ci. 22a- 5.5)

vided into naps Lia and 6,v 6a. The nature of l the score lines and the mode of their formation and shipped prior to use, in the form of a flat body and two cupshaped,'but relatively shallow end pieces.

It is an object of my invention to increase strengthand rigidity of such containers. y It is an object of my invention to produce end pieces of better structural characteristics,y and which, while they have suillcient `resiliency for locking purposes, form va more'positive lock.

It is an object ofl my invention to provide a new, simplilled, and cheaper .mode of manufacture of the end pieces whereby a betterv article canbe made at less cost, and with a relatively small outlay in equipment,

' These and other objectso! my invention which will be set forth hereinafter or will be apparent to one skilled in the art upon reading this specification, I accomplish in that certain constructio'n and arrangement o! parts and by that procedure of which I shall now describe an exemplary embodiment. Reference is made to the drawing wherein: 1

Figure 1 is a plan view of a body blank.

Figure 2 is a perspective view of the body in formed but substantially iiat condition.

Figure 3 is a perspective view oiP an end piece blank.

oie

Figure 4 is a partial sectional view showing the set off by a score line I. The remainder of the length oi the blank is divided by another vertical score line 2. Adjacent the sides of the blank I provide score lines 1 and l. and the blank portions'projecting beyond these score lines are diwill be appropriate to the weight and caliper of the board. In the term boxboard I intend to embrace not only the product of the Fourdrinier or multi-cylinder board machines, but also in the larger containers, plied or pasted or combined boards, including so-called solid nbre," and faced, corrugated boards.

In forming up the body portion, the flaps 5, 5a, 6 and 6a are nrst bent over against the body of the blank in one direction on the score lines I and 8. Then the blank itself is folded in the other direction on the score line 2, Next the attachment flap 4 is folded over onto the opposite edge of the blank body and secured to it as by gluing, sewing, sta-pling, or a combination of thesev oi the body of the container when erected, by

an amount necessary to give the desired turn-up on the end piece. In any event, the turn-up will be of greater depth than the width of the flanges 5 and 6 on the body. About the periphery of the disc 9 I provide radial score lines I0. It is sometimes advisable to provide a circular score line il having a diameter approximately the diameter of the end of the container body.

The end piece disc 8 is formed into cup-shape by ya compression operation in dies as a preferable procedure. This is diagrammatically illustrated in Figure 4 where the disc 9 is shown shaped between an outer die member I2 and an inner one I3. The operation is not similar to current operations in forming compressed lids lor containersin that it is not necessary for me to 'exert sumcient pressure to consolidate the board after it has been crimped into shape by the dies. The scoring of the marginal portion of the disc 9 makes it easy tovshape the end piece, and while a heavy pressure may be used if desired, it is not4 advantageous. I do not rely on the crimping of my end pieces to maintain their shape during handling and use, but on the contrary employ an additional means for this purpose and also for the purpose of providing locking means;

This additional means is a strip of board (Il in Figure which is preferably of somewhat greater length than the inside diameter of the shaped end piece, although it may be of the same length or even oi' a slightly lesser length. The width of the strip I4 preferably does not exceed the difference between the width of the turn-up on the end piece and the width of the ilanges 5 or 6 on the body.

The strip is passed around the inside of the turn-up of the end piece. It is kept away from. the flat Portion of the end piece by a. distance sumcient to accommodate the flanges on the body of the container. The ends of the strip may be lapped if the strip is longer than the inside circumierence of the end piece. The strip is preferably held in place by a line of stitching I5 passing through the strip and the turned-up portion of the end piece. The line of stitching may lap itself at its ends as shown in Figure 6; but if desired the line of stitching may pass a plurality of times about the circumference of the end piece.

While the stitching is being done, the shape of the end piece may be maintained by a jig, which likewise may be congured if desired to gauge the distance of the edge of the strip I4 from the at part of the end piece. Where the width of the strip I4 plus the Width of the flange 5 or 6 is not greater than the width of the turned-up portion of the end piece, the strip lies wholly within the end piece. This is preferable from the standpoint of appearance, though from the standpoint of operability the edge of the strip I4 could project.

My end piece construction has a number of important advantages. There is a substantial saving in the amount of board required over a construction in which a locking flange on the inside of a cup-shaped end piece were formed from an extension of the periphery of a disc of box board from which the end piece is made.

The band I 4 not only forms a lock member to coact with the flanges 5 or 6 on the body of the container but also serves, together with the stitching, to maintain the shape of the end piece. Thus it resists any tendency of the crimped p0rtion of the end piece to flatten out. The compressing of the end piece has produced fairly regular crimps in the turned over portion because of the prescoring of the disc 9, and these crimps are caught in the line of stitching and maintained as such. For these reasons, I do not have to compress the board to the extent of attening the crimps in order to preserve the shape of the end piece.

The combination ol.' the stitching and the band, while it preserves the shape of the end piece, has sumcient resiliency to permit the end piece to be used as illustrated in Figure 7. Here the body oi' the container is shown at I with the outwardly and downwardly turned ange 8. The end piece formed from the disc 9 and the strip I4 has been placed over an end of the erected container body. The t is a tight one, for when the end piece is in place, the strip Il must lie in a position substantially co-planar with the flange 6 and its continuation Ia, to prevent the removal of the end piece. 'Ihis means that the band or strip I4 must have expanded suillciently to pass over the flange member i and 6a, and then must have contracted again. In accomplishing this, a very great strain and friction is imposed upon the board-sunlcient to pull apart unied portions of highly compressed, crimped boxboard such as are found in ordinary crimped board covers. My structure however, while stronger, is suiliciently resilient to avoid this diillculty; and the turned-up edges oi' the end pieces do not pull apart because they have not been so highly compressed. The board is able to adjust itself to the stresses imposed upon it. While these stresses are such as to tend to 'i delaminate boxboard itself or split it in its plane, the line or lines of stitching in my structure minimize this splitting tendency or prevent it entirely; and in cases where some splitting occurs, they render it nugatory by holding the board together.

Modifications may be made in my invention without departing" from the spirit of it. Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

l. In combination, a container body having a cylindrical shape and projecting abutment means at an end and extending outwardly peripherally at said end, and an end piece for said container body comprising a circular sheet of boxboard with its peripheral portions in upturned, substantially loosely crimped condition and with a bend of boxboard passing peripherally about the interior of the upturned portions and sewn thereto, said band of boxboard being spaced from the body of said end piece a distance equivalent to the width of said abutment means.

2. The structure claimed in claim 1 wherein said container body is a blank of boxboard with its end portions joined, said blank having side portions in the form of flanges turned outwardly and toward the mid-section of said body to form said abutment meana WILLIAM A. RINGLER. 

